List as object get property names

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I have a class that accepts an object as a DataSource. Which is usually a List of Anonymous type. I want to parse this List<t> and create a DataTable using the data in the List<t>. Below is the function in progress to doing this. It accepts an object data, which is the List<t> and so far is able to get the property names to create the columns, but I haven't figured out a way to get the values of the columns. I believe I have to someway cast the object to List<t>, but haven't figured out how to do that yet.

Here is the function in process:

public System.Data.DataTable ToDataTable(object data)
{
   
   System.Data.DataTable table = new System.Data.DataTable();

   System.ComponentModel.PropertyDescriptorCollection props = 
      System.ComponentModel.TypeDescriptor.GetProperties( 
         data.GetType().GetGenericArguments()[0]);
   
   for (int i = 0; i < props.Count; i++)
   {    
      
      System.ComponentModel.PropertyDescriptor prop = props[i];
      
      if (prop.PropertyType.Name.Contains("Nullable"))
         table.Columns.Add(prop.Name);
      else
         table.Columns.Add(prop.Name, prop.PropertyType);
      
   }

   object[] values = new object[props.Count];
   
   foreach( var item in data as System.Collections.IEnumerable)
   {
      
      for( int i = 0; i < values.Lenght; i++; )
         values[i] = props[i].GetValue(item);
      
      table.Rows.Add(values);
      
   }
   
   return (table);
   
}

Posted 24-Apr-12 7:47am

tzortzie

Updated 24-Apr-12 11:04am

v5

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Comments

Sergey Alexandrovich Kryukov 24-Apr-12 14:38pm

What exactly do you mean by "a list of anonymous type"? What do you mean by "get the list type"? From where?
First of all, it's good to understand what exactly you are trying to do.
--SA

2 solutions

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cechode · Answer 1 · 2012-04-24T09:26:00

Solution 2

how about using getproperties instead

C#

Type mytype = data.GetType();

foreach (var prop in mytype.GetProperties())
{
    table.Columns.Add(prop.Name, prop.GetValue(data,null).GetType());
}

Posted 24-Apr-12 9:26am

cechode

tzortzie · Answer 2 · 2012-04-24T11:04:00

public System.Data.DataTable ToDataTable(object data)
{

System.Data.DataTable table = new System.Data.DataTable();

System.ComponentModel.PropertyDescriptorCollection props =
System.ComponentModel.TypeDescriptor.GetProperties(
data.GetType().GetGenericArguments()[0]);

for (int i = 0; i < props.Count; i++)
{

System.ComponentModel.PropertyDescriptor prop = props[i];

if (prop.PropertyType.Name.Contains("Nullable"))
table.Columns.Add(prop.Name);
else
table.Columns.Add(prop.Name, prop.PropertyType);

}

object[] values = new object[props.Count];

foreach( var item in data as System.Collections.IEnumerable)
{

for( int i = 0; i < values.Lenght; i++; )
values[i] = props[i].GetValue(item);

table.Rows.Add(values);

}

return (table);

}